English verb conjugation
COULD UNTWINE

Regular verb: untwine - untwined - untwined

Affirmation

Simple form	V-ing form
I could untwine you could untwine he could untwine we could untwine you could untwine they could untwine	I could be untwining you could be untwining he could be untwining we could be untwining you could be untwining they could be untwining
Perfect	V-ing perfect
I could have untwined you could have untwined he could have untwined we could have untwined you could have untwined they could have untwined	I could have been untwining you could have been untwining he could have been untwining we could have been untwining you could have been untwining they could have been untwining

Negation

Simple form	V-ing form
I couldn't untwine you couldn't untwine he couldn't untwine we couldn't untwine you couldn't untwine they couldn't untwine	I couldn't be untwining you couldn't be untwining he couldn't be untwining we couldn't be untwining you couldn't be untwining they couldn't be untwining
Perfect	V-ing perfect
I couldn't have untwined you couldn't have untwined he couldn't have untwined we couldn't have untwined you couldn't have untwined they couldn't have untwined	I couldn't have been untwining you couldn't have been untwining he couldn't have been untwining we couldn't have been untwining you couldn't have been untwining they couldn't have been untwining

Interrogative form

Simple form	V-ing form
could I untwine? could you untwine? could he untwine? could we untwine? could you untwine? could they untwine?	could I be untwining? could you be untwining? could he be untwining? could we be untwining? could you be untwining? could they be untwining?
Perfect	V-ing perfect
could I have untwined? could you have untwined? could he have untwined? could we have untwined? could you have untwined? could they have untwined?	could I have been untwining? could you have been untwining? could he have been untwining? could we have been untwining? could you have been untwining? could they have been untwining?

Interro-negative form

Simple form	V-ing form
couldn't I untwine? couldn't you untwine? couldn't he untwine? couldn't we untwine? couldn't you untwine? couldn't they untwine?	couldn't I be untwining? couldn't you be untwining? couldn't he be untwining? couldn't we be untwining? couldn't you be untwining? couldn't they be untwining?
Perfect	V-ing perfect
couldn't I have untwined? couldn't you have untwined? couldn't he have untwined? couldn't we have untwined? couldn't you have untwined? couldn't they have untwined?	couldn't I have been untwining? couldn't you have been untwining? couldn't he have been untwining? couldn't we have been untwining? couldn't you have been untwining? couldn't they have been untwining?